fix(ci): improve compilation speed

Author: andogq

.cargo/mutants.toml

@@ -1,3 +1,5 @@
+profile = "mutants"
+
 exclude_globs = [
     "src/passes/codegen.rs", # Until LLVM snapshot tests are implemented.
     "src/ty/solver.rs", # Until solver is hardened and tested.

.github/actions/setup/action.yaml

@@ -31,3 +31,5 @@ runs:
         rustup toolchain install stable --profile minimal --no-self-update
 
     - uses: Swatinem/rust-cache@v2
+
+# spell-checker:ignore libtinfo,Swatinem

.github/workflows/ci.yaml

@@ -8,6 +8,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: "always"
+  CARGO_INCREMENTAL: 0
   LLVM_PATH: "${{ github.workspace }}/llvm"
   LLVM_VERSION: "18.1"
 
@@ -101,4 +102,3 @@ jobs:
           name: mutants-out
           path: mutants.out
 
-# spell-checker:ignore libtinfo,Swatinem

Cargo.toml

@@ -12,3 +12,7 @@ thiserror = "2.0.17"
 insta = "1.46.0"
 mockall = "0.14.0"
 rstest = "0.26.1"
+
+[profile.mutants]
+inherits = "test"
+debug = "none"